The Toronto Raptors are trying to make things right with rapper Wale ... after Wale and the team announcer got into serious beef at last night's game ... TMZ has learned.

Wale -- the Grammy-nominated artist behind the 2009 mega-hit "Chillin"-- confronted Raptors announcer Matt Devlin at the game in D.C. last night ... after Devlin made a comment on the air about how Wale is, "Not Drake, that's for sure."

Wale took the comment as an insult -- and tweeted to Devlin, "Watch your mouth." The rapper then approached the broadcasting booth and yelled a few words at Devlin. It's unclear what he said.